What does diagonal mean?

Definitions for diagonaldaɪˈæg ə nl, -ˈæg nl

Here are all the possible meanings and translations of the word diagonal.

Princeton's WordNet

  1. diagonal(noun)

    (geometry) a straight line connecting any two vertices of a polygon that are not adjacent

  2. diagonal, bias(noun)

    a line or cut across a fabric that is not at right angles to a side of the fabric

  3. diagonal(noun)

    an oblique line of squares of the same color on a checkerboard

    "the bishop moves on the diagonals"

  4. diagonal(noun)

    (mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry

  5. solidus, slash, virgule, diagonal, stroke, separatrix(adj)

    a punctuation mark (/) used to separate related items of information

  6. diagonal(adj)

    connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face

    "a diagonal line across the page"

  7. aslant, aslope, diagonal, slanted, slanting, sloped, sloping(adj)

    having an oblique or slanted direction


  1. diagonal(Noun)

    something arranged diagonally or obliquely

  2. diagonal(Noun)

    a line or cut across a fabric that is not at right angles to a side of the fabric

  3. diagonal(Noun)

    a punctuation mark used to separate related items of information

  4. diagonal(Noun)

    a diagonal line or plane

  5. diagonal(Noun)

    a line joining non-adjacent vertices of a polygon.

  6. diagonal(Adjective)

    Joining two nonadjacent vertices (of a polygon or polyhedron).

  7. diagonal(Adjective)

    Having a slanted or oblique direction, lines or markings.

  8. diagonal(Adjective)

    Pertaining to the front left and back right (or the front right and back left) legs of a quadruped.

  9. Origin: From diagonalis, from διαγώνιος, from διά + γωνία.

Webster Dictionary

  1. Diagonal(adj)

    joining two not adjacent angles of a quadrilateral or multilateral figure; running across from corner to corner; crossing at an angle with one of the sides

  2. Diagonal(noun)

    a right line drawn from one angle to another not adjacent, of a figure of four or more sides, and dividing it into two parts

  3. Diagonal(noun)

    a member, in a framed structure, running obliquely across a panel

  4. Diagonal(noun)

    a diagonal cloth; a kind of cloth having diagonal stripes, ridges, or welts made in the weaving

  5. Origin: [L. diagonalis, fr. Gr. from to angle; dia` through + an angle; perh. akin to E. knee: cf. F. diagonal.]


  1. Diagonal

    A diagonal is a line joining two nonconsecutive vertices of a polygon or polyhedron. Informally, any sloping line is called diagonal. The word "diagonal" derives from the ancient Greek διαγώνιος diagonios, "from angle to angle"; it was used by both Strabo and Euclid to refer to a line connecting two vertices of a rhombus or cuboid, and later adopted into Latin as diagonus. In mathematics, in addition to its geometric meaning, a diagonal is also used in matrices to refer to a set of entries along a diagonal line.

Chambers 20th Century Dictionary

  1. Diagonal

    dī-ag′o-nal, adj. through the corners, or from an angle to an opposite angle of a four or many sided figure.—n. a straight line so drawn.—adv. Diag′onally.—Diagonal scale, a scale for laying down small fractions of the unit of measurement, the parallel lines drawn lengthwise on its surface being divided into sections by lines drawn crosswise, and in one end section being intersected by a series of other parallel lines drawn obliquely at equal distances across them. [Fr.,—L. diagonalis, from Gr. diagōniosdia, through, and gōnia, a corner.]


  1. Chaldean Numerology

    The numerical value of diagonal in Chaldean Numerology is: 7

  2. Pythagorean Numerology

    The numerical value of diagonal in Pythagorean Numerology is: 9

Sample Sentences & Example Usage

  1. Hal Buell:

    Like any good, experienced and talented photographer, there's a sense of anticipation and a sense of shooting a picture at peak action -- and Joe got it, you couldn't have captured the action at a better peak. A moment earlier, and the flag would have been too low. If it had been a second later, the flag's staff would have been straight up and the photo wouldn't have had that strong diagonal line.

  2. Hal Buell:

    It's exquisite, you have this strong, diagonal line made by the flag staff. You have the flag snapping in the breeze. You have the pyramid-like shape of the Marines pushing the flag up. The men obviously are separate, but they appear as one. The blank background enhances the action by providing no distractions. Also, the photo is gifted with a softly filtered light. A very thin haze of clouds filters the light so that the shadows aren't harsh, but there is detail in all the shadows on the uniforms and the flag.

Images & Illustrations of diagonal

  1. diagonaldiagonaldiagonal

Translations for diagonal

From our Multilingual Translation Dictionary

Get even more translations for diagonal »


Find a translation for the diagonal definition in other languages:

Select another language:

Discuss these diagonal definitions with the community:

Word of the Day

Would you like us to send you a FREE new word definition delivered to your inbox daily?

Please enter your email address:     


Use the citation below to add this definition to your bibliography:


"diagonal." Definitions.net. STANDS4 LLC, 2018. Web. 23 Feb. 2018. <https://www.definitions.net/definition/diagonal>.

Are we missing a good definition for diagonal? Don't keep it to yourself...

Nearby & related entries:

Alternative searches for diagonal:

Thanks for your vote! We truly appreciate your support.